netdev - Re: [PATCH v8 1/3] Documentation: netlink: add a YAML spec for nfsd

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Date: Tue, 3 Oct 2023 10:55:40 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Lorenzo Bianconi <lorenzo@...nel.org>
Cc: linux-nfs@...r.kernel.org, lorenzo.bianconi@...hat.com,
 chuck.lever@...cle.com, jlayton@...nel.org, neilb@...e.de,
 netdev@...r.kernel.org
Subject: Re: [PATCH v8 1/3] Documentation: netlink: add a YAML spec for
 nfsd_server

On Mon, 11 Sep 2023 14:49:44 +0200 Lorenzo Bianconi wrote:
> Introduce nfsd_server.yaml specs to generate uAPI and netlink
> code for nfsd server.
> Add rpc-status specs to define message reported by the nfsd server
> dumping the pending RPC requests.

Sorry for the delay, some minor "take it or leave it" nits below.

> +doc:
> +  nfsd server configuration over generic netlink.
> +
> +attribute-sets:
> +  -
> +    name: rpc-status-comp-op-attr
> +    enum-name: nfsd-rpc-status-comp-attr
> +    name-prefix: nfsd-attr-rpc-status-comp-
> +    attributes:
> +      -
> +        name: unspec
> +        type: unused
> +        value: 0

the unused attrs can usually be skipped, the specs now start with value
of 1 by default. Same for the unused command.

> +      -
> +        name: dport
> +        type: u16
> +        byte-order: big-endian
> +      -
> +        name: compond-op
> +        type: array-nest

Avoid array-nests if you can, they are legacy (does this spec pass JSON
schema validation?).

There's only one attribute in the nest, can you use

	- 
	 name: op
	 type: u32
	 multi-attr: true

?

> +        nested-attributes: rpc-status-comp-op-attr

> +    -
> +      name: rpc-status-get
> +      doc: dump pending nfsd rpc
> +      attribute-set: rpc-status-attr
> +      dump:
> +        pre: nfsd-server-nl-rpc-status-get-start
> +        post: nfsd-server-nl-rpc-status-get-done

No attributes listed? User space C codegen will need those to make
sense of the commands.